astrogeodesy

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Grade measurement — is the geodetic determination of the local radius of curvature of the figure of the Earth by determining the difference in astronomical latitude between two locations on the same meridian, the metric distance between which is known.The first… … Wikipedia
Meridian arc — In geodesy, a meridian arc measurement is a highly accurate determination of the distance between two points with the same longitude. Two or more such determinations at different locations then specify the shape of the reference ellipsoid which… … Wikipedia
Transit instrument — In astronomy, transit instruments are used for the precise observation of star positions. The instruments can be divided into three groups: Meridian instruments for observation of star transits in the exact direction of South or North: * Meridian … Wikipedia
Fundamental station — A Fundamental point (in German Fundamentalpunkt ) is the geometric origin of a geodetic network and defines the geodetic datum of a national survey.Some fundamental stations are an astronomical or satellite geodetic observatory. In any case, the… … Wikipedia

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